This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A116233 #2 Mar 30 2012 17:40:40 %S A116233 12,3656544,4565635,5434364,6343455,3646962589704198388, %T A116233 6353037410295801611,9101508044249652934, %U A116233 7903999111431765764698711045777,9722180929613583946516892863959 %N A116233 n times n+2 gives the concatenation of two numbers m and m-8. %e A116233 6343455 * 6343457 = 4023943//4023935, where // denotes %e A116233 concatenation. %Y A116233 Cf. A116102, A116226, A116232, A116234, A116247. %K A116233 nonn,base %O A116233 1,1 %A A116233 _Giovanni Resta_, Feb 06 2006